Language/Symantic/Expr/Int/Test.hs

   1 {-# LANGUAGE FlexibleContexts #-}
   2 {-# LANGUAGE GADTs #-}
   3 {-# LANGUAGE NoMonomorphismRestriction #-}
   4 {-# LANGUAGE Rank2Types #-}
   5 {-# LANGUAGE ScopedTypeVariables #-}
   6 {-# OPTIONS_GHC -fno-warn-missing-signatures #-}
   7 module Expr.Int.Test where
   8
   9 import Test.Tasty
  10 import Test.Tasty.HUnit
  11
  12 import Control.Arrow (left)
  13 -- import Data.Functor.Identity (Identity)
  14 -- import Control.Monad.IO.Class (MonadIO(..))
  15 import Data.Proxy (Proxy(..))
  16 import Data.Text (Text)
  17 import Data.Type.Equality ((:~:)(Refl))
  18 import Prelude hiding (and, not, or)
  19
  20 import Language.Symantic.Repr
  21 import Language.Symantic.Expr
  22 import Language.Symantic.Type
  23 -- import Language.Symantic.Trans
  24
  25 import AST.Test
  26
  27 -- * Class 'Sym_Int_Vars'
  28
  29 -- | A few boolean variables.
  30 class Sym_Int_Vars repr where
  31         x :: repr Int
  32         y :: repr Int
  33         z :: repr Int
  34 instance Sym_Int_Vars (Repr_Text fun) where
  35         x = Repr_Text $ \_p _v -> "x"
  36         y = Repr_Text $ \_p _v -> "y"
  37         z = Repr_Text $ \_p _v -> "z"
  38
  39 -- * Expressions
  40 e1 = int 1 `add` int 0
  41 e2 = (int 1 `add` int 0) `add` neg (int 1 `add` int 1)
  42 e3 = (int 1 `add` neg (int 0)) `add` (int 1 `add` neg (int 1))
  43 e4 = int 0 `add` neg (int 1)
  44 e5 = int 1 `add` neg x
  45 e6 = x `add` y
  46 e7 = (x `add` y) `add` z
  47 e8 = x `add` (y `add` int 1)
  48
  49 -- * Tests
  50 (==>) ast expected =
  51         testCase (show ast) $
  52         case expr_lambda_int_from (Proxy::Proxy IO) ast of
  53          Left err -> Left err @?= snd `left` expected
  54          Right (Exists_Type_and_Repr ty (Forall_Repr r)) ->
  55                 case expected of
  56                  Left (_, err) -> Right ("…"::String) @?= Left err
  57                  Right (ty_expected::Type_Root_of_Expr (Expr_Lambda_Int IO) h, _::h, _::Text) ->
  58                         (>>= (@?= (\(_::Proxy h, err) -> err) `left` expected)) $
  59                         case ty `type_eq` ty_expected of
  60                          Nothing -> return $ Left $
  61                                 error_expr (Proxy::Proxy (Expr_Lambda_Int IO)) $
  62                                 Error_Expr_Type_mismatch ast
  63                                  (Exists_Type ty)
  64                                  (Exists_Type ty_expected)
  65                          Just Refl -> do
  66                                 h <- host_from_expr r
  67                                 return $
  68                                         Right
  69                                          ( ty
  70                                          , h
  71                                          , text_from_expr r
  72                                          -- , (text_from_expr :: Repr_Text IO h -> String) r
  73                                          )
  74
  75 tests :: TestTree
  76 tests = testGroup "Int" $
  77  [ AST "int" [AST "1" []] ==> Right
  78          ( type_int
  79          , 1
  80          , "1" )
  81  , AST "bool" [AST "True" []] ==> Left (Proxy::Proxy Bool,
  82         Error_Expr_Alt_Curr $
  83         Error_Expr_Unsupported $ AST "bool" [AST "True" []])
  84  , AST "add"
  85          [ AST "int" [AST "1" []]
  86          , AST "int" [AST "1" []]
  87          ] ==> Right
  88          ( type_int
  89          , 2
  90          , "1 + 1" )
  91  , let ast = AST "app"
  92          [ AST "int" [AST "1" []]
  93          , AST "int" [AST "1" []]
  94          ] in ast ==> Left (Proxy::Proxy Int,
  95         Error_Expr_Alt_Curr $
  96         Error_Expr_Type_mismatch ast
  97          (Exists_Type (type_var SZero `type_fun` type_var (SSucc SZero)
  98          ::Type_Fun_Int IO (IO Zero -> IO (Succ Zero))))
  99          (Exists_Type type_int))
 100  , AST "app"
 101          [ AST "val"
 102                  [ AST "x" []
 103                  , AST "Int" []
 104                  , AST "var" [AST "x" []]
 105                  ]
 106          , AST "int" [AST "1" []]
 107          ] ==> Right
 108          ( type_int
 109          , 1
 110          , "(\\x0 -> x0) 1" )
 111  , AST "app"
 112          [ AST "val"
 113                  [ AST "x" []
 114                  , AST "Int" []
 115                  , AST "add"
 116                          [ AST "var" [AST "x" []]
 117                          , AST "int" [AST "1" []]
 118                          ]
 119                  ]
 120          , AST "int" [AST "1" []]
 121          ] ==> Right
 122          ( type_int
 123          , 2
 124          , "(\\x0 -> x0 + 1) 1" )
 125  , AST "let_val"
 126          [ AST "x" []
 127          , AST "int" [AST "1" []]
 128          , AST "add"
 129                  [ AST "var" [AST "x" []]
 130                  , AST "int" [AST "1" []]
 131                  ]
 132          ] ==> Right
 133          ( type_int
 134          , 2
 135          , "let x0 = 1 in x0 + 1" )
 136  ]